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Unscored CVE-2021-4218 EUVD-2021-34076GHSA-q6f7-v272-hqqq

A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This …

Published Aug 24, 2022 · Updated Aug 3, 2024 · Assigned by redhat

Package: linux-aws-5.0 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-azure Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-edge Package: linux-gcp Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gke-4.15 Package: linux-gke-5.4 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.8 Package: linux-hwe-edge Package: linux-intel-5.13 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.6 Package: linux-oracle-5.0 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-raspi2 Package: linux-riscv Package: linux-riscv-5.8 Ecosystem: Ubuntu

Description

A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This flaw allows a local attacker with local access to cause a denial of service while the system reboots. The issue is specific to CentOS/RHEL.

Affected products

VendorProductAffectedFixed
— kernel NA —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS linux-riscv +12 No fix yet —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —

References